Description
Airbag Control Unit For Citroën C2, C3 And Pluriel.
This airbag control unit (SRS Control Module) is a direct-fit electronic module intended for Citroën C2, Citroën C3 and Citroën C3 Pluriel. It monitors crash sensors, stores event data and controls airbag and pretensioner deployment during an impact. Mechanics and DIY enthusiasts commonly search by part numbers such as 9651927580 or 654583 — include these codes when looking up compatibility or replacement parts.
Function And Benefits
The unit continuously evaluates inputs from impact sensors, seat-belt buckle switches and airbag cushions to decide if and when to trigger safety devices. A properly functioning control unit ensures timely deployment of airbags and coordinated activation of seatbelt pretensioners, directly affecting occupant protection in a collision. Replacing a faulty unit restores the vehicle’s passive safety reliability and clears SRS fault warnings when combined with correct diagnostic procedures.
How The Part Is Replaced
Replacement should be performed by a trained technician or an experienced DIYer who follows safety rules. Basic steps typically include:
- Disconnect The Negative Battery Terminal And Wait At Least 10 Minutes To Allow Residual Charge To Dissipate.
- Remove Interior Trim Panels To Access The Control Unit (Locations May Vary By Model; Often Mounted Under The Center Console Or Passenger Footwell).
- Unplug Electrical Connectors And Unscrew Fasteners Holding The Module.
- Install The New Unit, Reconnect Connectors And Reassemble Trim.
- Use A Diagnostic Scanner To Clear SRS Fault Codes And Verify Correct System Status. Recalibration Or Coding May Be Required On Some Vehicles.
Replacement Frequency And Typical Fault Causes
Airbag control units are designed to last the vehicle’s life under normal conditions. Common reasons for replacement include damage from a prior collision (unit records crash events or is physically damaged), water ingress or corrosion of connectors, electrical surges, or internal component failure. After an impact the unit may store crash data and must be inspected and often replaced to restore full airbag functionality.
Installation Recommendations
- Always Disconnect The Battery Before Working On The SRS System And Follow Manufacturer Safety Intervals.
- Avoid Static Discharge And Do Not Probe Airbag Connectors With Power Applied.
- Replace Any Damaged Wiring Or Corroded Connectors To Prevent Recurrence Of Faults.
- Perform A Full SRS System Scan After Installation And Clear Stored Faults; Follow Any Reprogramming Or Coding Steps Required For The Vehicle.
- Keep A Record Of The Replaced Part Number For Future Service And Warranty Purposes.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C2; Citroën C3; Citroën C3 Pluriel
- Product Codes: 9651927580, 654583
- Other Numbers: 654584, 654691
